Apparently the "day to go" is on the first Sunday of a month. Then there are many more locomotives, and the engine museum is also opened and the engines are started. (I saw these running a couple of years ago and definitely worth the trip to go see). Pity I missed it this time round, but I'll go back soon.I took some pics inside the engine room:1925 Ruston Hornsby Size 7 Class H Oil engineBore: 250mm Stroke: 457mm Swept volume: 23LMass: 8.95T